* {
    margin: 0;
    padding: 0;
}
/* 背景 */
.parentbox {
    /* border: 1px solid; */
    height: 700px;
    background-image: url(https://z1.muscache.cn/pictures/carson/carson-1587915067054/original/aad16e09-d997-4272-a473-9c05f1779713.jpg);
    background-size:cover;
    background-repeat: no-repeat;
    display:flex;
    justify-content:center;
    align-items:center;
    flex-wrap: wrap;
}
.leftBox{
    width: 100%;
    margin-top: -100px;
}
.leftBox img{
    width:  162px;
    height: 34px;
    margin: 20px 0 0 20px;
    cursor: pointer;

 }
/* 注册页面 */
.head {
    color: white;
    text-align: center;
}
/* 登录框 */
.box {
    /* border: 1px solid ; */
    width: 500px;
    height: 400px;
    background-color: rgba(255, 255, 255, .4);
    border-radius: 2%;
}
/* 登录按钮 */
.registerbtn {
    margin-left: 28%;
    width: 220px;
    height: 40px;
    background-color: aquamarine;
    border: none;
    color: white;
}


.titlename{
    text-align: center;
    color: black;
}